276409481 has 2 divisors, whose sum is σ = 276409482. Its totient is φ = 276409480.

The previous prime is 276409457. The next prime is 276409487. The reversal of 276409481 is 184904672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271722256 + 4687225 = 16484^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 276409481 - 2¹⁴ = 276393097 is a prime.

It is a super-2 number, since 2×276409481² = 152804402373378722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (276409487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138204740 + 138204741.

It is an arithmetic number, because the mean of its divisors is an integer number (138204741).

Almost surely, 2^276409481 is an apocalyptic number.

It is an amenable number.

276409481 is a deficient number, since it is larger than the sum of its proper divisors (1).

276409481 is an equidigital number, since it uses as much as digits as its factorization.

276409481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 276409481 is about 16625.5670880725. The cubic root of 276409481 is about 651.4048361157.

The spelling of 276409481 in words is "two hundred seventy-six million, four hundred nine thousand, four hundred eighty-one".